Hi JTP, i do know that there are other systems than just a 'layer' approach.
I also know that it has been discussed before.
To name a few others, there are also 'Hypergraphs' networks as in Maya, or scene trees, such as the C4d object manager, ( the later combined with the new Filter and Layer tools in C4d it is quite good for complex scenes).

However this is what would keep me at the moment from doing anything more than just playing around with moi.
To do any kind of serious work, I need some kind of system for scene management ( call it layers or whatever else you like).
See Crusoe's post as well, which is my point.

Also as I said it would be necessary, to me at least, to have a system that can read the layers from 3dm files, and that can output files that are organized in some fashion, as I would imagine MOI as part of a bigger pipeline.